EP 0105792 B1 19870318 - VIDEO TEST METHOD AND APPARATUS WITH INCREMENTAL SCAN RATE CAPABILITY
Title (en)
VIDEO TEST METHOD AND APPARATUS WITH INCREMENTAL SCAN RATE CAPABILITY
Publication
Application
Priority
US 42988482 A 19820930
Abstract (en)
[origin: EP0105792A1] A video test pattern generator 15 is able to be incrementally adjusted in its number of lines (at 41) and in its line resolution (at 42), and at the same time is able to produce a reference frequency (at 43). The reference frequency is established at a selected value and offset from the selected value by an amount necessary to coincide with a multiple of a scan line frequency. This can be accomplished despite changes in scan rate and raster pattern. A stroke generation capability (at 44) is provided and the system can be utilized with programmable character generation and can produce a high-resolution image with a minimum of hardware. Further advantages include the ability of the system to adapt to new or changed equipment to be tested.
IPC 1-7
IPC 8 full level
G01R 31/00 (2006.01); H04N 3/00 (2006.01); H04N 17/00 (2006.01); H04N 17/04 (2006.01); H04N 17/06 (2006.01)
CPC (source: EP US)
H04N 17/045 (2013.01 - EP US)
Designated contracting state (EPC)
DE IT SE
DOCDB simple family (publication)
EP 0105792 A1 19840418; EP 0105792 B1 19870318; CA 1196416 A 19851105; DE 3370431 D1 19870423; JP H0473111 B2 19921119; JP S5991375 A 19840526; US 4466014 A 19840814
DOCDB simple family (application)
EP 83401869 A 19830923; CA 438141 A 19830930; DE 3370431 T 19830923; JP 18292883 A 19830930; US 42988482 A 19820930